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Course Contents

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Anatomy of the System Design Interview Requirements & NFRs That Matter The Delivery Framework The Design Template Communicating While Designing Whiteboard & Diagram Craft The Questions Everyone Asks (FAQ)Full Mock Walkthrough Checkpoint: The Method

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Pattern: Scaling Reads Pattern: Scaling Writes Pattern: Dealing with Contention Pattern: Real-time Updates Pattern: Long-Running Tasks Pattern: Handling Large Blobs Pattern: Multi-Step Processes Pattern: Fan-out — Feeds & Timelines Pattern: Top-K & Counting at Scale Pattern: Proximity & Geo Pattern: Dedup & Uniqueness Pattern: Search-Shaped Problems Checkpoint: Problem Patterns

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Redis, Inside-Out PostgreSQL, Inside-Out Cassandra, Inside-Out DynamoDB, Inside-Out Elasticsearch, Inside-Out MongoDB, Inside-Out Checkpoint: Technology Deep-Dives: Data

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Kafka, Inside-Out Flink, Inside-Out ZooKeeper & etcd, Inside-Out S3 & Object Storage, Inside-Out Gateways: nginx & Envoy Landmark Systems & Papers Map Checkpoint: Technology Deep-Dives: Infra

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SQL vs NoSQL, Decided Postgres vs DynamoDB vs Cassandra Kafka vs RabbitMQ vs SQS Redis vs Memcached REST vs gRPC vs GraphQL Push vs Pull Latency vs Accuracy The Cloud-Service Map Checkpoint: The Decision Layer

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How You're Actually Graded The L4 / L5 / L6 Rubric The Marketplace @L4 The Marketplace @L5 The Marketplace @L6 The Level Jumps on a Second Problem Failure Modes by Level Grade Yourself Checkpoint: Level Calibration Capstone Pass 5: The Full Interview Run

Pattern: Real-time Updates

Push one change to thousands of watchers with the real-time pattern — real-time as a number, the ceiling that falls as you grow, sockets as a fast path not a source of truth, presence, and sockets per box.

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